<!--
 * @Descripttion: 
 * @version: 
 * @Author: Zuo
 * @Date: 2021-08-04 17:56:59
 * @LastEditors: Zuo
 * @LastEditTime: 2021-08-04 18:02:32
-->
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        // 3 7 4 1 2 5
        const first = () => (new Promise((resolve, reject) => {
            console.log(3)
            let p = new Promise((resolve, reject) => {
            console.log(7)
            setTimeout(() => {
                console.log(5)
                resolve(6) //会被忽略，因为状态已经改变过了
            }, 0)
            resolve(1)
            })
            resolve(2)
            p.then((arg) => {
            console.log(arg)
            })

        }))

        first().then((arg) => {
            console.log(arg)
        })
        console.log(4)
    </script>
</body>
</html>